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| All Patents in class 322/71 | |||||
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| Number | Date | Patentee | Title | Type | |
| 276,569 | May 01, 1883 | L. Daft | Electric Railway | electric railroads | |
| 309,536 | Dec. 23, 1884 | W.K. Freeman | Regulator for Electric Generators & Motors | motor regulators | |
| 432,652 | Jul. 22, 1890 | E. Thomson | Welding or other dynamo | welding | |
| 2,102,481 | Dec. 14, 1937 | C.W. Noe | Dynamo motor | welding machines | |